Zeolite-Based Sustained-Release Pesticidal Formulation
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Solution Overview
Problem
Conventional sustained-release solid pesticidal formulations require costly coating processes or the use of hydrophobic materials like waxes, and their adsorption abilities are not always sufficient, posing challenges in manufacturing and environmental impact.
Innovation Solution
A solid pesticidal formulation combining agrochemical active ingredients with a specific type of zeolite having high SiO2 and Al2O3 content, a specific molar ratio, and small particle size, which allows for sustained release without resin film coating or hydrophobic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a coated pesticidal granule with resin film is used, then sustained-release effect is improved, but manufacturing cost increases and environmental pollution worsens
Solution Approach 1:
The invention extracts and eliminates the resin film coating process from the pesticidal granule formulation. By using porous carriers with controlled pore structures, the sustained-release function is achieved without the need for additional coating materials, thereby reducing manufacturing complexity and environmental impact while maintaining the duration of action.
Solution Approach 2:
The invention employs porous carriers with specifically controlled pore sizes and structures to achieve sustained-release of pesticidal active ingredients. The porous structure provides adsorption sites and controlled release pathways, eliminating the need for resin film coatings while maintaining the desired release profile and reducing manufacturing costs.
2Duration of action of moving object
If hydrophobic materials like wax are blended, then sustained-release effect is improved, but manufacturing complexity and environmental impact worsen
Solution Approach 1:
The invention removes hydrophobic materials like wax from the formulation by utilizing porous carriers with appropriate pore structures. These carriers provide inherent controlled-release capabilities through their physical structure, eliminating the need for additional hydrophobic additives and simplifying the overall formulation.
Solution Approach 2:
The porous carrier's pore structure serves as the primary mechanism for controlling pesticide release. By adjusting pore size, surface area, and carrier composition, the sustained-release effect is achieved without requiring hydrophobic materials, thereby reducing formulation complexity and environmental concerns.
3Device complexity
If conventional porous carrier is used, then formulation simplicity is maintained, but adsorption ability and retainability of pesticidal active ingredient are insufficient
Solution Approach 1:
The invention optimizes key parameters of the porous carrier including pore size distribution, specific surface area, and chemical composition to enhance adsorption ability. By carefully controlling these parameters, the carrier achieves high retainability of pesticidal active ingredients while maintaining formulation simplicity and avoiding complex coating processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This formulation enables efficient and cost-effective sustained release of pesticidal active ingredients, reducing manufacturing costs and environmental concerns while maintaining effective pest control.
Implementation Method 1
a solid pesticidal formulation comprising a pesticidal active ingredient and a porous carrier having adsorption ability
Data Source
AI summary
A sustained-release solid pesticidal formulation comprising pesticidal active ingredient and a zeolite as specified below, wherein the solubility in water of the pesticidally active ingredient is 100 to 100000 mg/L, and wherein the zeolite has SiO2 and Al2O3 in total of 90% by weight or more to the weight of the zeolite, has molar ratio of SiO2/Al2O3 of 4 or more, and has an average particle size of 10 μm or less.